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TRUENVIRQNMENTAL, INC. <br />A Texas Research International Company <br />May 8, 2010 <br />Ryan J. McHale, PE <br />Venture Resources, Inc. <br />PO Box 1974 <br />Idaho Springs, CO 80452 <br />P: (303) 619-6323 <br />ventureresources@att.net <br />Re: Results of Compression Loading Testing (TRI Log No. E2337-29-02) <br />Dear Mr. McHale, <br />TRI/Environmental, Inc. (TRI) is very pleased to present this final report for the requested compression <br />testing. The testing was performed to determine the out-of-plane deformation resistance of a 60 mil <br />textured geomembrane compressive loading within a liner system. All sample materials and testing <br />activities were managed under TRI log number E2337-21-02. <br />Technical Approach <br />The compression testing was performed in general accordance with ASTM D 5514, Test Method for <br />Large Scale Hydrostatic Puncture Testing of Geosynthetics. The test vessel measured 30 inches in <br />diameter facilitating a 24 inch diameter test area. The test vessel is composed of a top and bottom half <br />with an intermediate center section measuring 4 inches in height. The top portion of the bottom of the <br />test vessel was filled with the subgrade soil. The subgrade soil was remolded to 95% of maximum dry <br />density at the optimum moisture content as determined by standard Proctor or to 112.3 lb/W at 11.4% <br />moisture content. A provided Bentomat DN GCL was then placed over the soil. Next, a 0.5 mm lead <br />sheet cover was placed on top of the GCL to record and "lock-in" the deformation in the 60 mil HDPE <br />textured geomembrane which was placed over the lead sheet. <br />After securing the top test chamber, air was introduced above geomembrane to provide normal <br />compressive stress through the bladder and onto the liner system. A normal compressive stress was <br />applied at 1 psi per minute until a static load of 105 psi was achieved. This load was allowed to remain <br />static for 24 hours. The test was conducted for 24 hours only. <br />• <br />9063 Bee Caves Road / Austin, 'rX 78733 / 512 263 2101 / fax 512 263 2558 / sallen@tri-env.com